Vlf Whistler
Vlf-3 Kit

This very low frequency radio reciever kit is sold by Nasa’s Inspire project – a group based around the study radio atmospheric phenomena, aka whistlers. These pulses occur in a frequency range audible to us humans (1 to 30 kHz) – and they sound quite mysterious an interesting. Listen to some samples – Spaceweathersounds.com

VLF-3 kit on Flickr